<template>
	<view>
		<!-- 使用自定义的组件 -->
		<my-search @click="gotoSearch" ></my-search>
		
		
		<view class="scroll-view-container">

			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view @click="activeChange(index)"
					:class="['left-scroll-view-item',index === active ? 'active':'']">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">

				<view class="cate-lv2" v-for="(item2,index2) in cateLevel2 " :key="index2">

					<!--  二级分类标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<!-- 二级分类下的三级分类的盒子 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的 item -->
						<view @click="gotoGoodsList(item3)" class="cate-lv3-item"
							v-for="(item3,index3) in item2.children" :key="index3">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>

		</view>
	</view>
</template>

<script>
import badgeMinx from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMinx],
		data() {
			return {
				// 当前设备可用的高度
				wh: 0,
				// 分类数据列表
				cateList: [],
				// 激活项
				active: 0,
				// 二级分类列表
				cateLevel2: [],
				// 滚动条距离顶部的距离
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight-50
			this.getCateList()
		},

		methods: {
			// 获取分类列表的数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status != 200) {
					return uni.$showMsg()
				}
				this.cateList = res.message

				// 二级分类赋值 默认大家电这一一项 就是第0项
				this.cateLevel2 = res.message[0].children

			},
			activeChange(index) {
				this.active = index

				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[index].children

				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			// 跳转到商品列表页面
			gotoGoodsList(item3) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id


				})
			},
				
			gotoSearch(){
				
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}

		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #F7F7F7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;

				&.active {
					background-color: #FFFFFF;
					position: relative;

					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #C00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}

	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;

		.cate-lv3-item {
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;


			image {
				width: 60px;
				height: 60px;

			}

			text {
				font-size: 12px;
			}
		}
	}
</style>